Please make sure you are NOT using anything else to block the same number, either your phone's internal blocking list (auto reject list), or your carrier's blocking service, or any other call blocking app. The pick up and hang up won't work if you are using something else to block the same number. If you are not sure, turn off the blocker and see if the call is still blocked.

This registry contains telephone numbers and the owners of those numbers that refuse to receive unsolicited calls from telemarketers. You can register your telephone number online at: www.donotcall.gov for United States and at: www.lnnte-dncl.gc.ca for Canada.